xxxxxxxxxx () => {​ var fs = new FileSystem({ timestamp: dynamicMetadata.timestamp, files: files }, domDrive, dynamicDrive);​ callback(null, fs);​ });​ }​ function purgeDynamicAsync( domDrive: fs.attached.SyncDrive, domMetadata: FileSystem.Metadata, dynamicDrive: fs.attached.AsyncDrive, dynamicMetadata: FileSystem.Metadata) {​ asyncForEach( dynamicMetadata.files, (f, i, fcallback) => { dynamicDrive.writeAsync(f, null, domMetadata.timestamp, () => { fcallback(null, null); }); }, () => { var fs = new FileSystem(domMetadata, domDrive, dynamicDrive); callback(null, fs); }); }​ }); }}